53 lines
1.4 KiB
LLVM
53 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=i686-windows -stackrealign | FileCheck %s
|
|
|
|
declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
|
|
declare void @oneparam(i32 %a)
|
|
declare void @eightparams(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h)
|
|
|
|
; When there is no reserved call frame, check that additional alignment
|
|
; is added when the pushes don't add up to the required alignment.
|
|
; CHECK-LABEL: test5:
|
|
; CHECK: subl $16, %esp
|
|
; CHECK-NEXT: pushl $4
|
|
; CHECK-NEXT: pushl $3
|
|
; CHECK-NEXT: pushl $2
|
|
; CHECK-NEXT: pushl $1
|
|
; CHECK-NEXT: call
|
|
define void @test5(i32 %k) {
|
|
entry:
|
|
%a = alloca i32, i32 %k
|
|
call void @good(i32 1, i32 2, i32 3, i32 4)
|
|
ret void
|
|
}
|
|
|
|
; When the alignment adds up, do the transformation
|
|
; CHECK-LABEL: test5b:
|
|
; CHECK: pushl $8
|
|
; CHECK-NEXT: pushl $7
|
|
; CHECK-NEXT: pushl $6
|
|
; CHECK-NEXT: pushl $5
|
|
; CHECK-NEXT: pushl $4
|
|
; CHECK-NEXT: pushl $3
|
|
; CHECK-NEXT: pushl $2
|
|
; CHECK-NEXT: pushl $1
|
|
; CHECK-NEXT: call
|
|
define void @test5b() optsize {
|
|
entry:
|
|
call void @eightparams(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8)
|
|
ret void
|
|
}
|
|
|
|
; When having to compensate for the alignment isn't worth it,
|
|
; don't use pushes.
|
|
; CHECK-LABEL: test5c:
|
|
; CHECK: movl $1, (%esp)
|
|
; CHECK-NEXT: call
|
|
define void @test5c() optsize {
|
|
entry:
|
|
call void @oneparam(i32 1)
|
|
ret void
|
|
}
|
|
|
|
!llvm.module.flags = !{!0}
|
|
!0 = !{i32 2, !"override-stack-alignment", i32 32}
|